Paper towns, by John Green. It's told from a guy's point of view, but has a great kick butt female character. Here's a link with a quick description
http://www.goodreads.com/book/show/2914097.Paper_TownsAlso try Looking for Alaska, also by John Green.
http://www.goodreads.com/book/show/99561.Looking_for_Alaskaaaand my last two recommendations are The Hunger Games by Suzanne Collins and Wake by Lisa McMann. Both are good (totally about different things though) but in my opinion the first two are the best books ever.
smile Leave your own book suggestions!